# A model of a planetary system

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wnznvpnua

Science

## Description

1. Understand Kepler’s Laws of orbital motion.
2. Discover how the distance and planet’s tangential speed affects the shape of the orbit.
3. Measure the change in orbital period as distance is increased.
4. Apply concepts relating to Kepler’s Laws to speculate conditions that lead to a stable planet environment for evolution of life.

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Hey buddy, I apologize if it took me too long to finish your lab report. Here it is. Let me know if you have questions.

1
Physics PhET Lab:
A model of a planetary system

NAME ________________________

Student Learning Objectives:
1. Understand Kepler’s Laws of orbital motion.
2. Discover how the distance and planet’s tangential speed affects the shape of
the orbit.
3. Measure the change in orbital period as distance is increased.
4. Apply concepts relating to Kepler’s Laws to speculate conditions that lead to
a stable planet environment for evolution of life.
Lab simulation time: 40 minutes
This is a "virtual lab". We will do an experiment using software which can be found
at the PhET simulations page:
1) Using Select Preset, select “Sun and Planet”. Then select, System centered,
Show Traces, and Show Grid. Determine responses to the questions below
by running the simulation.
a) What are the preset values for: the mass of the star, the mass of the planet, the
distance, and the velocity?
The mass of the star is preset at 200 while the mass of the planet has a preset
value of 100. The distance and the velocity has been originally set to 150 and
120, respectively.
b) Describe the shape of the orbit.
The shape of the orbit is circular with the star rotating on its axis at the center
and the planet orbiting around the star in an almost circular motion.
c) How does the distance and planet tangential speed affect the shape of the orbit?
(Distance and tangential spee...

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